Nun.
Two: one to get it 95% done, and the second to give it the twist at the end.
Hippies don't screw in lightbulbs they screw in dirty sleeping bags.
A convent!
A nun with a spear through her head.
Because he didn't know what alignment. I hope this one cracks you up!
Counterfitz
Two, one to change the lightbulb and another to show one they changed earlier.
None, change comes from within.
Because they have no attachments.